Alright, ready to do some subtraction? We're taking 852943901 and subtracting 226246918 from it.

Step 1: We'll start by subtracting the digit 8 and the borrow 0 from 1 in column 1 and get -7.
We add -7 to 10 and get 3 as the first digit of the result.

Step 2: We'll start by subtracting the digit 1 and the borrow 1 from 0 in column 2 and get -2.
We add -2 to 10 and get 8 as the next digit of the result.

Step 3: We'll start by subtracting the digit 9 and the borrow 1 from 9 in column 3 and get -1.
We add -1 to 10 and get 9 as the next digit of the result.

Step 4: We'll start by subtracting the digit 6 and the borrow 1 from 3 in column 4 and get -4.
We add -4 to 10 and get 6 as the next digit of the result.

Step 5: We'll start by subtracting the digit 4 and the borrow 1 from 4 in column 5 and get -1.
We add -1 to 10 and get 9 as the next digit of the result.

Step 6: We'll start by subtracting the digit 2 and the borrow 1 from 9 in column 6 and get 6.
6 is the next digit of our result.

Step 7: We'll start by subtracting the digit 6 and the borrow 0 from 2 in column 7 and get -4.
We add -4 to 10 and get 6 as the next digit of the result.

Step 8: We'll start by subtracting the digit 2 and the borrow 1 from 5 in column 8 and get 2.
2 is the next digit of our result.

Step 9: We'll start by subtracting the digit 2 and the borrow 0 from 8 in column 9 and get 6.
6 is the next digit of our result.

So, 852943901 - 226246918 = 626696983.